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A Stereoselective Approach to 1,3-Amino Alcohols Protected as Cyclic Carbamates: Kinetic vs. Thermodynamic Control
Direct enantiocontrolled access to 1,3‐amino alcohols protected as cyclic carbamates is described. The approach is based on the addition of a silyl dienolate to aldehydes in the presence of 10 % of Carreira's catalyst (vinylogous Mukaiyama‐aldol addition). The obtained δ‐hydroxyesters were redu...
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Published in: | European Journal of Organic Chemistry 2007-09, Vol.2007 (26), p.4293-4297 |
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container_end_page | 4297 |
container_issue | 26 |
container_start_page | 4293 |
container_title | European Journal of Organic Chemistry |
container_volume | 2007 |
creator | Broustal, Garance Ariza, Xavier Campagne, Jean-Marc Garcia, Jordi Georges, Yohan Marinetti, Angela Robiette, Raphaël |
description | Direct enantiocontrolled access to 1,3‐amino alcohols protected as cyclic carbamates is described. The approach is based on the addition of a silyl dienolate to aldehydes in the presence of 10 % of Carreira's catalyst (vinylogous Mukaiyama‐aldol addition). The obtained δ‐hydroxyesters were reduced to pent‐2‐ene‐1,5‐diols, which were converted into the corresponding dicarbamates with tosyl isocyanate. Stereoselective cyclization of these dicarbamates proceeded with 1,3‐asymmetric induction under either thermodynamic or kinetic control to afford enantioselectively six‐membered‐ring cyclic carbamates. Calculations enabled us to rationalize the observed stereoselectivity. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) |
doi_str_mv | 10.1002/ejoc.200700503 |
format | article |
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subjects | 1,5‐Diols 5-Diols Aldol reactions Allylation Carbamates Chemical Sciences Organic chemistry Palladium |
title | A Stereoselective Approach to 1,3-Amino Alcohols Protected as Cyclic Carbamates: Kinetic vs. Thermodynamic Control |
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